CN102262176B - A kind of method of the channel data for measuring power system line feed terminals - Google Patents
A kind of method of the channel data for measuring power system line feed terminals Download PDFInfo
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- CN102262176B CN102262176B CN201110161986.7A CN201110161986A CN102262176B CN 102262176 B CN102262176 B CN 102262176B CN 201110161986 A CN201110161986 A CN 201110161986A CN 102262176 B CN102262176 B CN 102262176B
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- variable connector
- feed terminals
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005070 sampling Methods 0.000 claims abstract description 61
- 230000005611 electricity Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
Abstract
A kind of method of the channel data for measuring power system line feed terminals, it is characterised in that: described power system includes single channel AD, variable connector, sampling computing module.The present invention utilizes variable connector to control single channel AD to multichannel switch sampling；The data after sampling and variable connector is utilized to calculate each Channel Synchronous sampling point data switching time；Recycling synchronizes sampling point data and calculates the data such as the voltage in loop, electric current, phase angle, power, power factor (PF).Decrease the complexity of the sample circuit design of line feed terminals, and substantially reduce the number the AD quantity used in single line feed terminals, decrease the cost of terminal.Owing to needing to use in a large number line feed terminals in current intelligent grid construction, the method can directly reduce the input cost of line feed terminals, thus brings considerable economic benefit.
Description
Technical field
The present invention relates to power domain, in particular for measuring the channel data of power system line feed terminals
Method.
Background technology
As national energy strategy and the important component part of reply climate change strategy, intelligent grid is
Enter eve of developing on a large scale.And as an important equipment in intelligent grid link, line feed terminals is wherein
Occupy critically important status.It is logical that a usual line feed terminals to measure multiple switch tens (even twenties tunnels)
The data in road, use the such line feed terminals of traditional method to be accomplished by multiple multichannel AD or tens
Individual single channel AD, such scheme can cause terminal cost the highest.
Summary of the invention
The technical problem to be solved is to provide a kind of for measuring power system line feed terminals
The method of channel data, it is possible to reduce the usage quantity of AD in line feed terminals, reduces terminal hardware design
Complexity, thus the cost of terminal is greatly reduced, reduce the construction cost of whole system.
For solving above-mentioned technical problem, the technical scheme is that a kind of for measuring power system
The method of the channel data of line feed terminals, described power system includes single channel AD, variable connector, sampling
Computing module；Concrete measuring method is as follows:
(1) after system starts, sampling computing module be first according to theoretical default frequency 50HZ of electrical network and
The total number of channels needing sampling calculates interval switching time of variable connector, uses variable connector in setting
Control a single channel AD switching in time interval multiloop is sampled；
(2) sampling computing module calculates, according to the initial data of sampling, the amount that each loop is unrelated with angle；
(3) sampling computing module calculates the angle between each passage according to the initial data of sampling；
(4) sampling computing module utilize interval calculation switching time of variable connector obtain each passage due to
The differential seat angle that the time difference of sampling causes, and then revise the correct differential seat angle obtaining between each passage；
(5) sampling computing module draws each loop according to each interchannel phase calculation revised
Power factor (PF), calculates the power in each loop in conjunction with power factor (PF) and voltage, galvanometer.
(6) sampling computing module according to the initial data of the sampling in the regular hour and during this period of time in
The number of times of sampled data zero crossing calculates the actual frequency of current electric grid, utilizes this actual frequency and needs to adopt
The total number of channels of sample calculates variable connector interval switching time made new advances；
(7) sampling computing module utilizes the switching of the calculated new variable connector in above-mentioned steps (6)
Repeat step (1)-(7) behind interval the switching time in time interval replacement step (1) to realize persistently sampling and calculating
Go out each required real-time electric parameter data.
The present invention is compared with prior art had the benefit that
The present invention utilizes variable connector control single channel AD to multichannel switch sampling, utilizes after sampling
Data and variable connector calculate each Channel Synchronous sampling point data switching time, and recycling synchronizes sampling point data meter
Calculate the data such as the voltage in loop, electric current, phase angle, power, power factor (PF).Decrease line feed terminals
The complexity of sample circuit design, and substantially reduce the number the AD quantity used in single line feed terminals, reduce
The cost of terminal.Owing to needing to use in a large number line feed terminals in current intelligent grid construction, the method is permissible
Directly reduce the input cost of line feed terminals, thus bring considerable economic benefit.
Accompanying drawing explanation
Fig. 1 is the actual moment schematic diagram of each channel sample of native system.
Fig. 2 is the sampling instant schematic diagram of the revised sampling point in theory of method through the present invention.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention will be further described.
A kind of method of the channel data for measuring power system line feed terminals, described power system bag
Include single channel AD, variable connector, sampling computing module；Concrete measuring method is as follows:
(1) as it is shown in figure 1, after system startup, sampling computing module is first according to the acquiescence that electrical network is theoretical
Frequency (50HZ) and the switching time needing the total number of channels of sampling to calculate variable connector are spaced, and use multichannel
Switch one single channel AD switching of control in the time interval set multiloop is sampled；Adopt later
The interval of sample is adjusted to quantity, due to electrical network frequency according to the frequency of last computation and the president of needs sampling
Rate will not frequently change, and adjusts variable connector according to frequency and does once 1 second switching time；
(2) sampling computing module calculates, according to the initial data of sampling, the amount that each loop is unrelated with angle,
Including voltage and current；
(3) sampling computing module calculates the angle between each passage according to the initial data of sampling；
(4) as in figure 2 it is shown, sampling computing module utilizes be calculated each switching time of variable connector
The differential seat angle that passage caused due to the time difference of sampling, and then revise the correct angle obtaining between each passage
It is poor to spend；
(5) sampling computing module draws each loop according to each interchannel phase calculation revised
Power factor (PF), in conjunction with the data such as power factor (PF) and voltage, the galvanometer power calculating each loop.
(6) sampling computing module according to the initial data of the sampling in the regular hour and during this period of time in
The number of times of sampled data zero crossing calculates the actual frequency of current electric grid, utilizes this frequency and needs sampling
Total number of channels calculates variable connector interval switching time made new advances；
(7) sampling computing module utilizes the switching of the calculated new variable connector in above-mentioned steps (6)
Repeat step (1)-(7) behind interval the switching time in time interval replacement step (1) to realize persistently sampling and calculating
Go out required each real-time electric parameter data (voltage, electric current, phase angle, power, power factor (PF) etc.).
The present invention utilizes variable connector control single channel AD to multichannel switch sampling, utilizes after sampling
Data and variable connector calculate each Channel Synchronous sampling point data switching time, and recycling synchronizes sampling point data meter
Calculate the data such as the voltage in loop, electric current, phase angle, power, power factor (PF).Decrease line feed terminals
The complexity of sample circuit design, and substantially reduce the number the AD quantity used in single line feed terminals, reduce
The cost of terminal.Owing to needing to use in a large number line feed terminals in current intelligent grid construction, the method is permissible
Directly reduce the input cost of line feed terminals, thus bring considerable economic benefit.
Claims (1)
1. the method being used for measuring the channel data of power system line feed terminals, it is characterised in that: described electricity
Force system includes single channel AD, variable connector, sampling computing module；Concrete measuring method is as follows:
(1), after system starts, sampling computing module is first according to theoretical default frequency 50HZ of electrical network and needs
The total number of channels of sampling calculates interval switching time of variable connector, uses variable connector in the time set
Control a single channel AD switching in interval multiloop is sampled；
(2) sampling computing module calculates, according to the initial data of sampling, the amount that each loop is unrelated with angle；
(3) sampling computing module calculates the angle between each passage according to the initial data of sampling；
(4) sampling computing module utilizes interval calculation switching time of variable connector to obtain each passage due to sampling
The differential seat angle that causes of time difference, and then revise the correct differential seat angle obtaining between each passage；
(5) sampling computing module draws the power in each loop according to each interchannel phase calculation revised
Factor, calculates the power in each loop in conjunction with power factor (PF) and voltage, galvanometer；
(6) sampling computing module according to the initial data of the sampling in the regular hour and during this period of time in sampling
The number of times of data zero crossing calculates the actual frequency of current electric grid, utilizes this actual frequency and needs sampling
Total number of channels calculates variable connector interval switching time made new advances；
(7) sampling computing module utilizes the switching time of the calculated new variable connector in above-mentioned steps (6)
Repeat step (1)-(7) behind interval the switching time in interval replacement step (1) to realize persistently sampling and calculating institute
Each the real-time electric parameter data needed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110161986.7A CN102262176B (en) | 2011-06-16 | 2011-06-16 | A kind of method of the channel data for measuring power system line feed terminals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110161986.7A CN102262176B (en) | 2011-06-16 | 2011-06-16 | A kind of method of the channel data for measuring power system line feed terminals |
Publications (2)
| Publication Number | Publication Date |
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| CN102262176A CN102262176A (en) | 2011-11-30 |
| CN102262176B true CN102262176B (en) | 2016-09-07 |
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| CN201110161986.7A Active CN102262176B (en) | 2011-06-16 | 2011-06-16 | A kind of method of the channel data for measuring power system line feed terminals |
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Families Citing this family (2)
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| CN105301402B (en) * | 2015-11-12 | 2018-04-13 | 积成电子股份有限公司 | A kind of ac signal acquisition and automatic calibrating method |
| CN110277995A (en) * | 2019-07-30 | 2019-09-24 | 荏原冷热系统（中国）有限公司 | Sampling channel modification method and system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2702666C3 (en) * | 1977-01-24 | 1980-01-03 | Hartmann & Braun Ag, 6000 Frankfurt | Circuit arrangement for monitoring the phase currents in multi-phase networks |
| CH660798A5 (en) * | 1983-10-10 | 1987-06-15 | Landis & Gyr Ag | ADDITIONAL CIRCUIT TO A MEASURING CONVERTER. |
| CN201122243Y (en) * | 2007-07-25 | 2008-09-24 | 唐德尧 | Wireless sensor device for detecting device fault |
| CN201434904Y (en) * | 2008-12-26 | 2010-03-31 | 广州电器科学研究院 | Battery detecting sampling control device based on CPLD |
| CN201497780U (en) * | 2009-08-06 | 2010-06-02 | 上海工业自动化仪表研究所 | Rapid cyclic-detection device for two-wire industrial instruments |
| CN201522701U (en) * | 2009-11-23 | 2010-07-07 | 威胜集团有限公司 | Multi-channel analog signal amplification data acquisition circuit |
| CN101887092A (en) * | 2010-06-25 | 2010-11-17 | 房慧龙 | Resistance measurement method with wide temperature range, wide measurement range, high precision and low cost |
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